Question

Question #fe40a

Answer 1

I found that the water released `31,350J` of energy

Explanation:

We could use the fact that a mass `m` of water to change from temperature `T_i=25°C` to `T_f=10°C` will release energy `Q` given as:
`Q=mcDeltaT`

Where:

`c=4.18J/(g°C)` specific heat of water (i.e. the energy in Joules to change of `1°C` the mass of `1g` of water);

`DeltaT=T_f-T_i`

You get:

`Q=500*4.18(10-25)=-31,350J`

The minus sign indicates the loss of energy sustained by the water.

Hope it helps!